90763861 has 4 divisors (see below), whose sum is σ = 90783532. Its totient is φ = 90744192.

The previous prime is 90763853. The next prime is 90763963. The reversal of 90763861 is 16836709.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10929636 + 79834225 = 3306^2 + 8935^2 .

It is a cyclic number.

It is not a de Polignac number, because 90763861 - 2³ = 90763853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90763801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1255 + ... + 13531.

It is an arithmetic number, because the mean of its divisors is an integer number (22695883).

Almost surely, 2^90763861 is an apocalyptic number.

It is an amenable number.

90763861 is a deficient number, since it is larger than the sum of its proper divisors (19671).

90763861 is a wasteful number, since it uses less digits than its factorization.

90763861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19670.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 90763861 is about 9527.0069276767. The cubic root of 90763861 is about 449.4047454620.

The spelling of 90763861 in words is "ninety million, seven hundred sixty-three thousand, eight hundred sixty-one".